: High-definition video courses or large document repositories.

If you are experiencing errors such as or "Checksum error," it usually means this specific part is corrupted and needs to be re-downloaded, or you are missing a part of the set.

: Large installations split into manageable chunks.

Even if parts of an archive are damaged, it is possible to fully recover the stored data if a large enough recovery record exists.

: You cannot open "Part 2" in isolation. You must have pncch-infinity.part1.rar (and any subsequent parts like .part3, .part4, etc.) in the same folder for the extraction process to work.

Do you have of the archive downloaded and in the same folder? rar - ArchWiki

: Massive libraries of brushes, textures, or 3D models.